Abstract: Mobile operating system(MOS)is the foundational software based on current international competitive field．MOS is the basic system software for mobile devices,it controls all resources of mobile device and provides basic servi-ces and application development．The architecture design is a main task of the new MOS development．This paper analyzed the structures of the mainstream MOS Andriod,iOS,Symbian and Windows Phone,compared the similarities and differences of the architecture and implementation technology,gived the technical routes of autonomous MOS,discussed the development trend of MOS,and pointed out the development trend of the future MOS．This paper is proposed to provide technical support and help for the development of MOS.

Key words: Mobile operating system,Architecture,Mobile internet,Layered architecture